Armored conductor.



G. A. LUTZ.

ARMORED CONDUCTOR.

APPLICATION FILED JUNE'17,1907.

Patented Mar.30,1909.

T amm UNITED STATES PATENT canton.

GEORGE A. LUTZ, OF NEW YORK, N. Y., ASSIGNOR TO AMERICAN CIRCULAR LOOM COMPANY,

OF PORTLAND, MAINE, A CORPORATION OF MAINE.

ARMORED CONDUCTOR.

Specification of Letters Patent.

Patented March so, 1909.

Application filed June it, 1907. Serial No. 379,346.

.ity of longitudinally disposed strips arranged parallel side by side in circular form around a central axis and adapted to receive a conductor, such as an insulated cable, in the'space within said strips, and I place a binder or winding of suitable material, such as flexible metal, around said strips to hold them in tubular relation, and I also provide means to limit or prevent relative longitudinal movement of said strips, and whereby the conductor contained within said strips is protected.

My invention also comprises the further novel details of improvement that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is to be had to the accompanying drawings forming part hereof, wherein Figure 1 is a side elevation of a portion of an armored conductor comprising my invention; parts being broken away. Fig. 2 is a cross'section on the line 2, 2, in Fig. 1, Fig. 3 is an enlarged central section substantially on the line 3, 3, in Fig. 2, and Fig. 4 is a detail perspective of a portion of one of the armored strips.

Similar numerals of reference indicate correspondingparts in the several views.

In the drawings the numerafl indicates strips of suitable material, such as metal, arranged longitudinally and pa allel edge to edge and in a circular direction in tubular form surrounding a cable or conductor 2, and said strips may be curved transversely to substantially correspond to the curvature of said cable, as shown in Fig. 2. The strips 1 are held in place 'in tubular form by a hinder or winding 3 which may be in the form of a metal strip and which is shown wound spirally around strips 1, and covers the joints between the longitudinal edges of said strips 1. To keep the binding strip 3 in place and to prevent relative longitudinal movementof strips 1 the latter are pro-' strips 1, as in a spiral-like direction, so that the spirally disposed b111d111g 3 will he in the spaces I of strips 1 between their projections 4, and the ends of the projections l of one strip substantially aline with the ends of the projections 4 of the adjacent strips providing spirally disposed recesses on the surface of the tubular conduit formed by the ad acent longitudinally disposed strips 1. The grooved portions of strip 1 assist in permitting'said strips to bend by increasing their flexibility when arranged. as set forth, and as the projections at engage binding 3 longitudinal movement of strips 1 is limited.

To close the joints between the adjacent projections at I provide a strip 5 that is wound over said projections, the strip 5 being shown grooved longitudinally to fit upon and re-j strip 5 is keptfrom displacement along the able.

The covering or conduit may be made by first producing the projections 4 in strips 1 by any suitable means, then laying said strips lengthwise and parallel side by side around the conduit or cable 2 so that the ends of the projections 1 of one'strip substantially aline with the ends of projections 4 of adjacent strips, and then the binding strip 3 is wound spirally around strips 1 in the spaces 1 and thus the pro-tectin covering or conduit is secured upon the ca lo, and the strips 1 are held from undue-displacement in any direction. The resulting armored cable or conductor is protected by the covering described and yet the same may bend for carrying the armored cable around corners and in differentpositions.

The tubular protecting coverii'ig for the cable or conductor has a substantially smooth inner wall or surface, whereby the cable or conductor may be withdrawn from or pulled into the coverin without injuring the insulation of the cable or conductor.

l-laving now described my invention what 7 lit 'protecti'ngenvelop provided with exterior integral projections extending around the same, and a cover inclos ng said envelop.

2. A-protectlng covering for electric conductors comprising a tubular longitudinally tially tubular formand provided with exprojections.

terior projections, and a binding strip wound upon the first named strips and between said 4. A protecting covering for electric con- 'ductors, comprising a plurality of longitudinally disposed strips located in substantiallyvtubular form and provided with spirally disposed projections on the exterior thereof, and a binding strip wound spirally around said strips-and between the projections thereof. 5. An armored conductor comprising an insulated cable having a tubular cover comprising longitudinal strips provided with exterior projections, and a binding'around said cover".

6. An armored conductor comprising an insulated'cable provided with strips extending longitudinally thereon and surrounding the same, said strips being provided with exterior projections, and a binding strip wound upon the first named strips in a spiral direc'- tion.

7. An armored conductor comprising an insulated cable provided with strips longitudinally disposed and surrounding the same,

'saidfstrips having spirally disposed projections on' their exterior, and a. bindin strip wound spirally around the first name strips and between the corresponding projections thereof;

8. A protecting covering for electric conductors comprising apluralitypf longitudinally disposed strips located in substantially tubular form and provided with exterior projections, a bin ing strip wound upon the first named strips and between said projections, and a stamp wound upon said projections to cover the joints between adjacent projections.

9. A protecting covering for electric conductors comprising a plurality of longitudinally disposed strips located in substantially tubular form and provided with exterior projections a binding strip wound upon the first named strips and between said projections, and a longitudinally grooved strip wound upon-said projections and receiving the same to cover the joints between adjacent projections.

10. An armored conductor comprising an insulated cable provided with strips extending longitudinally thereon and surrounding the same, said strips being provided with exterior projections, and a binding strip wound upon said first named strips in a'spiral direction, and a strip wound over vsaid projections to cover the joints between adjacent projections.

11. ,An armored conductor comprising an insulated cable provided with strips longitudinally disposed and surrounding the same, said strips having spirally disposed projections on their exterior, a binding strip wound spirally around the first named strips and between the corresponding projections thereof, and a grooved strip wound spirally over said projections to cover the joints between adjacent projections.

12. A protecting covering for electric conductors comprising an inner tube provided with spirally disposed projections and c011- volutions between the same formed of material separate from the tube, the inner wall of said tube at the parts between the projections being substantially smooth, and a jacket covering said projectionsand convolutions.

' 13. A protecting covering for electric conductors comprising an inner tube provided with corrugations extending around said tube, the inner surface of said tube between the corrugations being substantially smooth, and an outer covering secured to said corrugations and holding the same in place and covering the joints thereof. 7

Signed at New York city in the county of New York and State of New York this 13th day'of June A. D. 1907. v

' f GEORGE A. LUTZ.

Witnesses:

T. F. BoUnNE, Baum H. RAPHAEL. 

